PUCHEROS is a high resolution optical Echelle spectrograph designed for the 50 cm telescope located at the
Pontificia Universidad Cat´olica de Chile (PUC) observatory of Santa Martina. With a resolution about 20,000,
PUCHEROS is an ideal instrument to study bright and variable objects, our driving science case is the study
of bright early type stars. Using a fiber optic to bring the light from the telescope to the instrument, it can be
located in a gravity invariant, temperature stabilized location, allowing precise long-term stability. PUCHEROS
will be a valuable tool both for research and didactics at the graduate and undergraduate level. In this work we
present the optical and mechanical design of the spectrograph as well as the first laboratory tests.

The Department of Astronomy and Astrophysics (DAA) of the Pontificia Universidad Católica de Chile (PUC) operates
a small observatory at Santa Martina hills located in the outskirts of Santiago. Despite the close distance (about 30 km)
from the centre of a very large metropolitan area, the observatory offers excellent conditions in terms of number of clear
nights and relatively good conditions in terms of light pollution and image quality. The observatory is mostly used for
didactic purposes, however we are evaluating scientific applications as well.

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